Locomotive-boiler.



0. D. ORVISL LOCOMOTIVE BOILER.

APPLICATION FILED SEPT. 12, 1906. RENEWED 1120.14, 1908.

Patented July 20, 1909.

wan moses To all 'whom it maii'conm."

Be it known that I, OREL' D. Davis, a;citizen of the United States, and a resident of building UNITED o'nnrxn; onvrs, CPI-JERSEY err-r, EW'JE'RsEY.

'noooMo'rIvn-Bomnnq 9 no. eaasso.

. Application filed sept'eniber 1'2 1906,'Sei-la1 miss-1,229 mesa December 14, 1908. [satin in).- 467,535.

Jersey City, in the county of Hudson and State of New Jersey, haveinvented certain new and usefulIm rovements in Locomotive-Boilers, of whic fi'oation.

This invention relates to improvements in locomotive boilers and has for its particular object the construction of a downdraft furnace to be applied to such boilers; though it will be seen t at my invention is applicable to other types of boilers as well.

My invention provides a down draft furnace within the fire box of a locomotive and constructed in such a manner as to ob-' tain smokeless combustion, increased heating surface and improved water circulation, hence an increase in the efiiciency of the boiler and economy in the con'sum tion of fuel. These objects are attained wit 'out re ducing the grate surface ornecessitating the of a new locomotive, my invention being applicableto any existing type of the same. 1

-I provide my draft water grate onto which the fuel is fed, and a lower grate of any suitable form. On said lower grate the artly consumed fuel from the upper one fa ls and burns. \Valls are formed around the upper fire box and the same is covered by means of an arch of fire proof material, thereby creating a chamber above and around the bed of fuel.

By admitting the air requisite for-perfect combustion over and above the burning fuel, and causing it to pass downward through the same together with any smoke and gas re 40 tained in said chamber, a smokeless combustion and consequent fuel economy are made ositive.

It will also be seen from the following description that my invention makes possible an equal distribution of heat on all varts of the heating surface, and further, that the cold air is revcnted from coming into contact with the flue head or entering the fines,

when stoking or cleaning the fire, thereby insuring greater durability and reducing the cost of maintenance.

- In the following specif cation and the accompanying sheet of drawings, 1 have shown my invention in its preferred form, but as this may vary, I claim all such changes as may come within the spirit and scope of my the following is a speci.

furnace with an upper down have shown so much of the outline of 'a typical locomotive boiler in its conventional form as to enable those skilled in the artto understand and apply my invention.

. In the said drawings, dinal section through a portion of a locomotive boiler having a down draft furnace embodying my invention and Fig. 2 is a front elevation of Fig. 1 with arts removed.

The reference numera roper, 2 and 3 are the front and rear water egs respectively while 4 indicates the side water legs.

5 is the crown sheet. sheet is located my down draft furnace having. the down draft water grate 6 and the up draft grate 7 of any suitableconstruction.

The water grate is formed of a series of tubes 8, connected by the central header 9. The said tubes are bent at right angles and their u per ends communicate with the boiler t rough the crown sheet. The tubes are expanded into the header and the crown sheet, thus allowing. and contraction. water tube grate, forming the bottom and sides of the upper fire box 10, and which .is

eovered by the fire proof arch 11, preferably built in sections and supported on theside walls or linings 13, also of fire roof material and inside the water tubes.v he linings are su ported on one or more pipes 14 on either s1 Below said crown The end wall of the fire box is built as follows: A transverse header 15 communicates with the side water legs and rests in the center on the header 9, with which 'it also communicates by means of the short pi e 16. This transverse header connects the ower ends of the water filled'pipes 17-, whose other upper ends are connected with the boiler t rough the crown sheet. The spaces between these pipes are filled in with fire proof material 18 to the height" of the arch. Two transverse tubes, 19 connect the central header with the side water andsaid 'header is also in communication with the front and rear water legs by means of apertures 20and'21.

Figure l is a longituif 1 denotes the boiler of individual expansion he fuel is fed onto thelegs of the boiler,

It will here be noted that between the end chamber 23 with which the fines communicate and it will also be understood that the said wall and the arch prevent the cold air from reaching the fines.

wall of the fire box and the flue head 22 is a i I In the drawing-is indicated by arrows in dottedlines, the travel of the gases. It will be seenthat a direct passage from the fire box to the chamber 23 is provided, the gases 1 with the lesser up provided through which the gases, after havmg passed down through the upper grate,

ass and mix above the arch and then pass into the chamber 23 in which all the gases commingle before entering the fines, thus the heat is ap lied equally to the increased heating surface, t e circulation of wateris very rapid and smokeless combustion is assured.

What I claim is: 1. In alocomotive, the combination with a boiler, a furnace, a fire box, a plurality of water tubes forming a Water grate at the bottom of said fire box, side Walls formed by a-portion of said water tubes, a lining Within said side Walls, a wall closing said fire box, composed partly of water tubes and part1 of fire proof material, an arch of fire proo material above said grate and con-' ,nections between said water grate and sald.

. -boiler.

2. In a locomotive, the combination with a boiler, a furnace, a down draft grate composed of Water tubes, a central header into which the inner ends of said tubes are horizontally expanded, a portion of said tubes .bent'vertically, a lining inside said vertical tubes, a tubular support for said lining, a fire proof arch resting on said lining, ver-- tical tubesforming a front wall of the fire box, and a transverse header connecting saidvertical tubes with said boiler.

', 3. In a locomotive, the combination with a boiler, a furnace, a fire box, a Water grate at the bottom thereof, side Walls formed by Water tubes, a fire proof lining within said Itubes, a fire proof arch between said tubes, an end wall, a draft passage at the bottom of said end wall and above said water grate and connections between the above mentioned tubes and said boiler.

4. In a locomotive, the combination with a boiler, a furnace, a down draft water grate composed of tubes, a central header connecting the inner ends of said tubes, connections between said central header and said boiler, side walls'formed bycsaid tubes bent at right angles, the outer ends of said tubes communicating with said boiler, an arch above said water grate, a transverse wall formed by vertical tubes and fire proof material, a trans verse header connecting the lower ends of said tubes, a connection between said-transverse header and said central header and transversely running connections between said central header and said boiler,

5. In a locomotive, the combination with a boiler, a furnace, a down draft water grate composed of a plurality of transversely running water tubes, a central longitudinal header connecting the said tubes, and communicating with said boiler, side walls formed by vertical continuations of said water tubeswhose upper ends are expanded into the crown sheet of the boiler, a fire proof lining within said side walls, a fire proof arch resting A on said lining and extending the length of the fire :box, a transverse Wall formed by vertical tubes, a transverse header connecting the lower ends of said vertical tubes, fire proof material between said tubes eating between said transverse and said central header and transverse connections between said central header and said boiler.

New York and State of New day of September A. D. 1906.

. OREL D. ORVIS. Witnesses:

GEO. A. MARSHALL, IVAN KONIGSBERG.

to the height of said arch, means oommuni-- Signed at New York city in the county of York-this 11th. 

